Modeling simulation demonstration device for mathematics

Abstract

The invention relates to the technical field of demonstration instruments, and discloses a mathematical modeling simulation demonstration device, which comprises an upper shell, a handle, a motor and a lower shell, the lower surface of the upper shell is attached to the upper surface of the lower shell, the lower surface of the motor is fixedly connected with a bearing box, the driving end of the motor is fixedly provided with a rotating shaft, and the rotating shaft is fixedly connected with the bearing box. A display screen is fixedly connected to the outer wall of the rotating shaft, a cleaning assembly is installed on the outer wall of the display screen and comprises a connecting plate, a first elastic part is fixedly arranged on the upper surface of the connecting plate, and the end, away from the connecting plate, of the first elastic part is fixedly arranged on the inner top wall of the upper shell; the upper surface of the connecting plate is fixedly connected with a first sliding column. Through mutual cooperation of the upper shell, the lifting handle, the cleaning assembly, the balancing weight and the first elastic piece, the display screen can be automatically cleaned every time the display screen is used, and the watching experience effect of viewers is improved.

Description

Technical Field

[0001] This invention relates to the field of demonstration technology, specifically to a mathematical modeling and simulation demonstration device. Background Technology

[0002] A mathematical modeling simulation demonstration device is a tool that integrates hardware and software systems. It can transform abstract mathematical models (such as equations, algorithms, data relationships, etc.) into visual dynamic effects. Through functions such as parameter adjustment, scene simulation, and real-time result presentation, it can intuitively demonstrate the model's construction logic, operation process, and application effects, helping users understand complex mathematical principles and verify the model's rationality. It is suitable for scenarios such as teaching demonstrations, scientific research experiments, and engineering problem analysis.

[0003] The current method usually involves projecting the image onto a screen using a projector. However, after prolonged use, dust easily accumulates on the screen surface, leading to a decline in the viewing experience and hindering teachers from conducting normal teaching demonstrations. Furthermore, projectors are prone to displacement due to external factors, requiring teachers to enter the classroom in advance to reposition and focus the projector, significantly increasing the inconvenience of using it. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a mathematical modeling and simulation demonstration device, which at least solves one of the technical problems of dust accumulation on the display screen surface leading to a decline in the viewing experience and the need for teachers to enter the classroom in advance to properly focus the projector.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mathematical modeling and simulation demonstration device, comprising an upper shell, a handle, a motor, and a lower shell. The lower surface of the upper shell is attached to the upper surface of the lower shell. A carrier box is fixedly connected to the lower surface of the motor. A rotating shaft is fixedly mounted on the drive end of the motor. A display screen is fixedly connected to the outer wall of the rotating shaft. A cleaning component is mounted on the outer wall of the display screen. The cleaning component includes a connecting plate. An elastic element is fixedly mounted on the upper surface of the connecting plate. The end of the elastic element away from the connecting plate is fixedly mounted on the inner top wall of the upper shell. A sliding column is fixedly connected to the upper surface of the connecting plate. A fixing block is slidably connected to the outer wall of the sliding column. A counterweight is fixedly connected to the upper surface of the connecting plate. A protective pad is attached to the side of the display screen away from the upper shell. The protective pad is fixedly mounted on the upper surface of the carrier box. A collection plate is fixedly connected to the outer wall of the display screen near the motor.

[0006] The above technical solution allows the cleaning plate to slide down the outer wall of the display screen automatically when the screen rotates and is perpendicular to the magnetic block. This is achieved by the magnetic repulsion between their opposite sides, ensuring that the screen is automatically cleaned every time it is used, thus improving the viewing experience.

[0007] Preferably, the cleaning assembly further includes an iron ring, which is fixedly disposed inside the upper outer wall of the display screen. A cleaning plate is magnetically attracted to the lower surface of the iron ring. A magnetic block is disposed directly above the cleaning plate. The cleaning plate and the magnetic block face each other magnetically and repel each other, and the repulsive force is greater than the magnetic attraction force between the iron ring and the cleaning plate. The outer wall of the cleaning plate is slidably connected to the outer wall of the display screen. The lower surface of the cleaning plate is attached to the upper surface of the collecting plate. The upper surface of the magnetic block is fixedly connected to the lower surface of the connecting plate.

[0008] Preferably, the outer wall of the handle is fixedly connected to the outer wall of the lower housing, the rotating shaft is rotatably connected to the inside of the carrier box, the outer wall of the connecting plate is slidably connected to the inside of the upper housing, and the outer wall of the fixing block is fixedly connected to the inner top wall of the upper housing.

[0009] Preferably, a gear is fixedly connected to the outer wall of the rotating shaft, and a toothed plate is meshed with the tooth end of the gear. The outer wall of the toothed plate is slidably connected to the inside of the bearing box. An air guiding assembly is fixedly installed on the lower surface of the toothed plate. The air guiding assembly includes a fixed column, the outer wall of which is fixedly connected to the inside of the bearing box. An air guiding pipe is fixedly installed inside the fixed column. An adjusting assembly is fixedly installed at the end of the air guiding pipe away from the fixed column. The adjusting assembly includes a sliding column three. A projector is fixedly connected to the top of the sliding column three. A storage box is rotatably connected to the outer wall of the projector. The lower surface of the storage box is fixedly connected to the inner bottom wall of the lower shell.

[0010] Preferably, the air guiding assembly further includes a second sliding column, the outer wall of which is fixedly connected to the lower surface of the toothed plate, and an airbag is attached to the end of the second sliding column away from the toothed plate. The outer wall of the second sliding column is slidably connected to the inside of the fixed column, the airbag is fixedly installed inside the fixed column, and the end of the air guiding tube near the toothed plate is fixedly disposed inside the airbag.

[0011] Preferably, the adjustment assembly further includes a housing, with one end of the air guide tube away from the fixed column fixedly disposed inside the housing, and an airbag two fixedly installed inside the housing. The outer wall of the air guide tube is fixedly connected to the housing and the interior of the airbag two, and the outer wall of the sliding column three is slidably connected to the interior of the housing, with the bottom end of the sliding column three abutting against the outer wall of the airbag two.

[0012] Preferably, a connecting rope is fixedly connected to the lower surface of the projector, a wheel is attached to the outer wall of the connecting rope, a slider is fixedly connected to the end of the connecting rope away from the projector, a second magnetic block is fixedly disposed on the outer wall of the slider, an iron block is attached to the outer wall of the second magnetic block, a third magnetic block is magnetically attracted to the side of the iron block away from the second magnetic block, the opposite sides of the second and third magnetic blocks are magnetically repelled, and the repulsive force is greater than the magnetic attraction force between the iron block and the third magnetic block, an elastic element two is fixedly disposed on the outer wall of the third magnetic block, and an elastic element three is fixedly disposed on the outer wall of the slider.

[0013] Preferably, the outer wall of the connecting rope is slidably connected to the inside of the storage box, the upper surface of the rotating wheel is fixedly installed inside the storage box, the outer wall of the slider is slidably connected to the inside of the storage box, the outer wall of the iron block is fixedly connected to the inside of the storage box, the end of the elastic element two away from the magnetic block three is fixedly installed inside the storage box, and the end of the elastic element three away from the slider is fixedly installed inside the storage box.

[0014] Preferably, the storage box has a T-shaped groove inside, and the slider and the magnetic block are slidably connected to the T-shaped groove.

[0015] Preferably, the storage box and the lower shell are provided with ventilation holes inside, and the ventilation holes are connected to each other.

[0016] Working principle: When the upper casing flips to a vertical position, gravity and the weight of the counterweight cause the connecting plate and the first magnetic block to slide downwards. Then, the motor is started to drive the rotating shaft to rotate, further causing the display screen, the iron ring, and the cleaning plate to flip. When the cleaning plate flips to a position perpendicular to the first magnetic block, the magnetic repulsion between the cleaning plate and the first magnetic block is greater than the attraction between the iron ring and the cleaning plate, thus causing the cleaning plate to slide down the outer wall of the display screen for automatic cleaning. When the upper casing is closed and the handle is lifted, the elastic element will pull the connecting plate, the counterweight, and the first magnetic block to reset. At this time, the cleaning plate will also return to its initial position under the action of gravity and re-attract to the iron ring, thus achieving automatic cleaning of the display screen every time it is used, improving the viewing experience.

[0017] This invention provides a mathematical modeling and simulation demonstration device. It has the following beneficial effects: 1. This invention achieves automatic cleaning of the display screen every time it is used by the cooperation of the upper shell, handle, cleaning component, counterweight and elastic element, thereby improving the viewing experience of the user.

[0018] 2. This invention automatically adjusts the projector to a suitable angle when using the display screen, thereby eliminating the need to adjust the angle and focus of the projector as is traditionally required, making it convenient for users to directly conduct teaching.

[0019] 3. This invention automatically opens the ventilation holes to dissipate heat when the projector is in use, thereby ensuring that the projector will not overheat even after prolonged use. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural diagram of the upper shell of the present invention; Figure 3 This is a partial structural diagram of the counterweight block of the present invention; Figure 4 This is a partial structural diagram of the protective pad of the present invention; Figure 5 This is a schematic diagram of a partial gear structure of the present invention; Figure 6 This is a partial structural diagram of the air duct of the present invention; Figure 7 This is a schematic diagram of a partial structure of the airbag of the present invention; Figure 8 This is a partial structural diagram of the storage box of the present invention; Figure 9 for Figure 8 Enlarged view of point A in the middle; Figure 10 This is a schematic diagram of a partial structure of the slider of the present invention.

[0021] The components are as follows: 1. Upper shell; 2. Handle; 3. Motor; 4. Rotating shaft; 5. Display screen; 6. Cleaning assembly; 61. Iron ring; 62. Cleaning plate; 63. Magnetic block one; 64. Connecting plate; 7. Elastic element one; 8. Sliding column one; 9. Fixing block; 10. Counterweight block; 11. Protective pad; 12. Collection plate; 13. Gear; 14. Tooth plate; 15. Air guiding assembly; 151. Sliding column two; 152. Fixing column; 153. Airbag one; 16. Air guiding tube; 17. Adjustment assembly; 171. Outer shell; 172. Airbag two; 173. Sliding column three; 18. Storage box; 19. Projector; 20. Rotating wheel; 21. Slider; 22. Magnetic block two; 23. Iron block; 24. Magnetic block three; 25. Elastic element two; 26. Elastic element three; 27. Lower shell; 28. Connecting rope; 29. ​​Carrier box. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 - Appendix Figure 4 This invention provides a mathematical modeling and simulation demonstration device, including an upper shell 1, a handle 2, a motor 3, and a lower shell 27. The lower surface of the upper shell 1 is attached to the upper surface of the lower shell 27. A carrier box 29 is fixedly connected to the lower surface of the motor 3. A rotating shaft 4 is fixedly installed at the drive end of the motor 3. A display screen 5 is fixedly connected to the outer wall of the rotating shaft 4. A cleaning component 6 is installed on the outer wall of the display screen 5. The cleaning component 6 includes a connecting plate 64. An elastic element 7 is fixedly installed on the upper surface of the connecting plate 64. The end of the elastic element 7 away from the connecting plate 64 is fixedly installed on the inner top wall of the upper shell 1. A sliding column 8 is fixedly connected to the upper surface of the connecting plate 64. A fixing block 9 is slidably connected to the outer wall of the sliding column 8. A counterweight block 10 is fixedly connected to the upper surface of the connecting plate 64. A protective pad 11 is attached to the side of the display screen 5 away from the upper shell 1. The protective pad 11 is fixedly installed on the upper surface of the carrier box 29. A collection plate 12 is fixedly connected to the outer wall of the display screen 5 near the motor 3.

[0024] Specifically, when the upper housing 1 is opened to a vertical position, the combined force of external gravity and the weight of the counterweight 10 causes the connecting plate 64 to slide downward inside the upper housing 1, further stretching the elastic element 7. Simultaneously, the sliding plate 64 also causes the sliding column 8 to slide inside the fixed block 9, thus limiting the sliding trajectory of the connecting plate 64 and improving its stability. Then, the motor 3 is activated to rotate the rotating shaft 4. When the rotating shaft 4 rotates, the fixed action between the rotating shaft 4 and the display screen 5 causes the display screen 5 to rotate. Once the display screen 5 has rotated to the appropriate position, the cleaning component 6 installed on its upper outer wall slides downward on the outer wall of the display screen 5, further cleaning the display. The screen 5 automatically cleans the surface dust and sweeps the cleaned dust into the collection plate 12 for easy centralized cleaning later. When not in use, the upper shell 1 is flipped to fit against the lower shell 27. At this time, the elastic element 7 resets the connecting plate 64, and further resets the counterweight 10 and the sliding column 8. Then, the handle 2 is lifted. Under the action of gravity, the cleaning component 6 located on the lower outer wall of the display screen 5 slides along the outer wall of the display screen 5 to its initial position, achieving automatic reset. Through the cooperation between the upper shell 1, handle 2, cleaning component 6, counterweight 10 and elastic element 7, the display screen 5 can be automatically cleaned every time it is used, improving the viewing experience for viewers.

[0025] Please see the appendix Figure 1 - Appendix Figure 4The cleaning component 6 also includes an iron ring 61, which is fixedly installed on the upper outer wall of the display screen 5. The lower surface of the iron ring 61 is magnetically attached to a cleaning plate 62. A magnetic block 63 is installed directly above the cleaning plate 62. The cleaning plate 62 and the magnetic block 63 are magnetically repulsive to each other, and the repulsive force is greater than the magnetic attraction force between the iron ring 61 and the cleaning plate 62. The outer wall of the cleaning plate 62 is slidably connected to the outer wall of the display screen 5. The lower surface of the cleaning plate 62 is attached to the upper surface of the collecting plate 12. The upper surface of the magnetic block 63 is fixedly connected to the lower surface of the connecting plate 64. The outer wall of the handle 2 is fixedly connected to the outer wall of the lower housing 27. The rotating shaft 4 is rotatably connected to the inside of the carrier box 29. The outer wall of the connecting plate 64 is slidably connected to the inside of the upper housing 1. The outer wall of the fixing block 9 is fixedly connected to the inner top wall of the upper housing 1.

[0026] Specifically, when the upper housing 1 is flipped to a vertical position, the connecting plate 64 will slide downward inside the upper housing 1 due to external gravity and the weight of the counterweight 10 itself. When the connecting plate 64 slides downward, the magnetic block 63 will slide downward due to the fixing effect of the connecting plate 64 and the magnetic block 63. Then, the motor 3 is turned on to drive the display screen 5 to rotate through the rotating shaft 4, which in turn drives the iron ring 61 and cleaning plate 62 installed on its upper outer wall to flip. When the two ends of the cleaning plate 62 are flipped to a position perpendicular to the magnetic block 63, At this time, the cleaning plate 62 and the magnetic block 63 repel each other on opposite sides, and the repulsive force is greater than the magnetic attraction force between the iron ring 61 and the cleaning plate 62. This causes the cleaning plate 62 to slide automatically downward on the outer wall of the display screen 5, thereby achieving automatic cleaning of the display screen 5. When the upper shell 1 is closed and the handle 2 is lifted, the elastic element 7 will pull the connecting plate 64 to reset, further resetting the counterweight 10 and the magnetic block 63. Under the action of external gravity, the cleaning plate 62 will automatically slide to the initial position and re-attract to the iron ring 61.

[0027] Please see the appendix Figure 5 - Appendix Figure 7A gear 13 is fixedly connected to the outer wall of the rotating shaft 4. The tooth ends of the gear 13 are meshed with a toothed plate 14. The outer wall of the toothed plate 14 is slidably connected to the inside of the bearing box 29. An air guiding assembly 15 is fixedly installed on the lower surface of the toothed plate 14. The air guiding assembly 15 includes a fixed column 152. The outer wall of the fixed column 152 is fixedly connected to the inside of the bearing box 29. An air guiding pipe 16 is fixedly installed inside the fixed column 152. An adjusting assembly 17 is fixedly installed at the end of the air guiding pipe 16 away from the fixed column 152. The adjusting assembly 17 includes a sliding column 173. A projector 19 is fixedly connected to the top of the sliding column 173. A storage box 18 is rotatably connected to the outer wall of the projector 19. The lower surface of the storage box 18 is fixedly connected to the inner bottom wall of the lower housing 27. The air guiding assembly 15 also includes a sliding column 151. The outer wall of the second sliding column 151 is fixedly connected to the lower surface of the toothed plate 14. The end of the second sliding column 151 away from the toothed plate 14 is attached to the first airbag 153. The outer wall of the second sliding column 151 is slidably connected to the inside of the fixed column 152. The first airbag 153 is fixedly installed inside the fixed column 152. The end of the air guide tube 16 near the toothed plate 14 is fixedly installed inside the first airbag 153. The adjustment assembly 17 also includes a housing 171. The end of the air guide tube 16 away from the fixed column 152 is fixedly installed inside the housing 171. The second airbag 172 is fixedly installed inside the housing 171. The outer wall of the air guide tube 16 is fixedly connected to the inside of the housing 171 and the second airbag 172. The outer wall of the third sliding column 173 is slidably connected to the inside of the housing 171. The bottom end of the third sliding column 173 is attached to the outer wall of the second airbag 172.

[0028] Specifically, when the rotating shaft 4 rotates, the fixed action of the rotating shaft 4 and the gear 13 will drive the gear 13 to rotate. After the gear 13 rotates for a period of time, its tooth end will mesh with the tooth plate 14, further driving the tooth plate 14 to slide inside the bearing box 29. When the tooth plate 14 slides, the fixed action of the tooth plate 14 and the sliding column 151 will drive the sliding column 151 to slide inside the fixed column 152. At the same time, it will cooperate with the fixed column 152 to compress the airbag 153. The gas generated by compressing the airbag 153 will be transported through the air guide tube 16 to the airbag 172 installed inside the outer shell 171, further pushing the sliding column 173 to slide out. When the sliding column 173 slides out, it will drive the projector 19 to rotate inside the storage box 18, thereby realizing the automatic adjustment of the projector 19 to a suitable angle when using the display screen 5. There is no need to consider the traditional need to adjust the angle and focus of the projector 19, which is convenient for users to directly use and teach.

[0029] Please see the appendix Figure 8 - Appendix Figure 10A connecting rope 28 is fixedly connected to the lower surface of the projector 19. A rotating wheel 20 is attached to the outer wall of the connecting rope 28. A slider 21 is fixedly connected to the end of the connecting rope 28 away from the projector 19. A second magnetic block 22 is fixedly installed on the outer wall of the slider 21. An iron block 23 is attached to the outer wall of the second magnetic block 22. A third magnetic block 24 is magnetically attracted to the side of the iron block 23 away from the second magnetic block 22. The opposite sides of the second magnetic block 22 and the third magnetic block 24 repel each other, and the repulsive force is greater than the magnetic attraction force between the iron block 23 and the third magnetic block 24. An elastic element 25 is fixedly installed on the outer wall of the third magnetic block 24. An elastic element 26 is fixedly installed on the outer wall of the slider 21. The connecting rope 28 The outer wall of the slider 21 is slidably connected to the inside of the storage box 18. The upper surface of the rotating wheel 20 is fixedly installed inside the storage box 18. The outer wall of the slider 21 is slidably connected to the inside of the storage box 18. The outer wall of the iron block 23 is fixedly connected to the inside of the storage box 18. The end of the elastic element 25 away from the magnetic block 24 is fixedly installed inside the storage box 18. The end of the elastic element 26 away from the slider 21 is fixedly installed inside the storage box 18. A T-shaped groove is opened inside the storage box 18. The slider 21 and the magnetic block 24 are slidably connected to the T-shaped groove. Ventilation holes are opened inside the storage box 18 and the lower shell 27, and the ventilation holes are interconnected.

[0030] Specifically, when the projector 19 is stored, the magnetic block 24 and the iron block 23 are in a mutually attracted state. At this time, the ventilation holes inside the storage box 18 and the lower shell 27 are sealed by the magnetic block 24, and the elastic element 25 is in a stretched state. When the projector 19 is rotated to adjust the angle, it will pull the connecting rope 28, which will further pull the slider 21 through the rotating wheel 20 to slide inside the T-shaped groove inside the storage box 18. At the same time, the elastic element 26 is compressed. The elastic element 1, elastic element 25 and elastic element 26 can be made of steel plate. Springs, helical springs, torsion bar springs, rubber springs, etc., preferably helical springs, are used to further drive the magnetic block 22 to slide. When the magnetic block 22 slides to a position parallel to the iron block 23, the magnetic repulsion between the opposite sides of the magnetic block 22 and the magnetic block 3 24 is greater than the magnetic attraction between the iron block 23 and the magnetic block 3 24. At this time, the elastic element 25 will pull the magnetic block 3 24 to reset, further canceling the sealing of the ventilation hole opened inside the storage box 18, thereby realizing the effect of automatically opening the ventilation hole for heat dissipation when the projector 19 is working.

[0031] Workflow: As the rotating shaft 4 rotates, it also drives the gear 13 to rotate. After rotating for a period of time, the gear 13 will mesh with the toothed plate 14, further causing it to slide inside the bearing box 29. This, in turn, drives the sliding column 151 to slide inside the fixed column 152, compressing the airbag 153. The gas generated by compressing the airbag 153 will be transported to the airbag 172 through the air duct 16, further pushing the sliding column 173 to slide out and causing the projector 19 to rotate inside the storage box 18. This achieves the effect that when using the display screen 5, the projector 19 can automatically adjust to a suitable angle without the need for manual angle adjustment and focus, making it convenient for users to directly conduct teaching demonstrations.

[0032] When the projector 19 is stored, the magnetic block 24 and the iron block 23 are attracted to each other, sealing the ventilation holes inside the storage box 18 and the lower shell 27. At this time, the elastic element 25 is in a stretched state. When the projector 19 is rotated to adjust the angle, the projector 19 pulls the connecting rope 28 to drive the slider 21 to slide in the T-shaped groove and compress the elastic element 26. When the slider 21 drives the magnetic block 22 to slide to a position parallel to the iron block 23, the magnetic repulsion between the two sides of the magnetic block 22 and the magnetic block 24 is greater than the attraction between the magnetic block 24 and the iron block 23. This further causes the elastic element 25 to pull the magnetic block 24 to reset, thereby canceling the seal on the ventilation hole. This allows the ventilation hole of the projector 19 to open automatically to dissipate heat when it is working, ensuring that the projector 19 will not overheat even after long-term use.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mathematical modeling and simulation demonstration device, comprising an upper shell (1), a handle (2), a motor (3), and a lower shell (27), characterized in that: The lower surface of the upper housing (1) is attached to the upper surface of the lower housing (27). A bearing box (29) is fixedly connected to the lower surface of the motor (3). A rotating shaft (4) is fixedly provided at the drive end of the motor (3). A display screen (5) is fixedly connected to the outer wall of the rotating shaft (4). A cleaning component (6) is installed on the outer wall of the display screen (5). The cleaning component (6) includes a connecting plate (64). An elastic element (7) is fixedly provided on the upper surface of the connecting plate (64). The elastic element (7) is located away from the connecting plate (64). One end is fixedly installed on the inner top wall of the upper shell (1). A sliding column (8) is fixedly connected to the upper surface of the connecting plate (64). A fixing block (9) is slidably connected to the outer wall of the sliding column (8). A counterweight block (10) is fixedly connected to the upper surface of the connecting plate (64). A protective pad (11) is attached to the side of the display screen (5) away from the upper shell (1). The protective pad (11) is fixedly installed on the upper surface of the carrier box (29). A collecting plate (12) is fixedly connected to the outer wall of the side of the display screen (5) close to the motor (3).

2. The mathematical modeling and simulation demonstration device according to claim 1, characterized in that: The cleaning component (6) also includes an iron ring (61), which is fixedly disposed on the upper outer wall of the display screen (5). The lower surface of the iron ring (61) is magnetically attached to a cleaning plate (62). A magnetic block (63) is disposed directly above the cleaning plate (62). The cleaning plate (62) and the magnetic block (63) are magnetically repulsive to each other on opposite sides, and the repulsive force is greater than the magnetic attraction force between the iron ring (61) and the cleaning plate (62). The outer wall of the cleaning plate (62) is slidably connected to the outer wall of the display screen (5). The lower surface of the cleaning plate (62) is attached to the upper surface of the collection plate (12). The upper surface of the magnetic block (63) is fixedly connected to the lower surface of the connecting plate (64).

3. The mathematical modeling and simulation demonstration device according to claim 1, characterized in that: The outer wall of the handle (2) is fixedly connected to the outer wall of the lower housing (27), the rotating shaft (4) is rotatably connected to the inside of the bearing box (29), the outer wall of the connecting plate (64) is slidably connected to the inside of the upper housing (1), and the outer wall of the fixing block (9) is fixedly connected to the inner top wall of the upper housing (1).

4. The mathematical modeling and simulation demonstration device according to claim 1, characterized in that: A gear (13) is fixedly connected to the outer wall of the rotating shaft (4). The tooth end of the gear (13) is meshed with a toothed plate (14). The outer wall of the toothed plate (14) is slidably connected to the inside of the bearing box (29). An air guide assembly (15) is fixedly installed on the lower surface of the toothed plate (14). The air guide assembly (15) includes a fixed column (152). The outer wall of the fixed column (152) is fixedly connected to the inside of the bearing box (29). An air guide pipe (16) is fixedly installed inside the fixed column (152). An adjustment assembly (17) is fixedly installed at one end of the air guide pipe (16) away from the fixed column (152). The adjustment assembly (17) includes a sliding column three (173). A projector (19) is fixedly connected to the top of the sliding column three (173). A storage box (18) is rotatably connected to the outer wall of the projector (19). The lower surface of the storage box (18) is fixedly connected to the inner bottom wall of the lower shell (27).

5. The mathematical modeling and simulation demonstration device according to claim 4, characterized in that: The air guiding assembly (15) also includes a second sliding column (151), the outer wall of which is fixedly connected to the lower surface of the toothed plate (14). An airbag (153) is attached to one end of the second sliding column (151) away from the toothed plate (14). The outer wall of the second sliding column (151) is slidably connected to the inside of the fixed column (152). The airbag (153) is fixedly installed inside the fixed column (152). The end of the air guiding tube (16) near the toothed plate (14) is fixedly installed inside the airbag (153).

6. The mathematical modeling and simulation demonstration device according to claim 4, characterized in that: The adjustment assembly (17) also includes a housing (171). One end of the air guide tube (16) away from the fixed column (152) is fixedly disposed inside the housing (171). An airbag (172) is fixedly installed inside the housing (171). The outer wall of the air guide tube (16) is fixedly connected to the inside of the housing (171) and the airbag (172). The outer wall of the sliding column (173) is slidably connected to the inside of the housing (171). The bottom end of the sliding column (173) is attached to the outer wall of the airbag (172).

7. The mathematical modeling and simulation demonstration device according to claim 4, characterized in that: A connecting rope (28) is fixedly connected to the lower surface of the projector (19). A rotating wheel (20) is attached to the outer wall of the connecting rope (28). A slider (21) is fixedly connected to the end of the connecting rope (28) away from the projector (19). A magnetic block two (22) is fixedly provided on the outer wall of the slider (21). An iron block (23) is attached to the outer wall of the magnetic block two (22). A magnetic block three (24) is magnetically attracted to the side of the iron block (23) away from the magnetic block two (22). The magnetic blocks two (22) and the magnetic blocks three (24) are magnetically repulsive on opposite sides, and the repulsive force is greater than the magnetic attraction force between the iron block (23) and the magnetic blocks three (24). An elastic element two (25) is fixedly provided on the outer wall of the magnetic block three (24). An elastic element three (26) is fixedly provided on the outer wall of the slider (21).

8. The mathematical modeling and simulation demonstration device according to claim 7, characterized in that: The outer wall of the connecting rope (28) is slidably connected to the inside of the storage box (18), the upper surface of the rotating wheel (20) is fixedly installed inside the storage box (18), the outer wall of the slider (21) is slidably connected to the inside of the storage box (18), the outer wall of the iron block (23) is fixedly connected to the inside of the storage box (18), the end of the elastic element two (25) away from the magnetic block three (24) is fixedly installed inside the storage box (18), and the end of the elastic element three (26) away from the slider (21) is fixedly installed inside the storage box (18).

9. A mathematical modeling and simulation demonstration device according to claim 8, characterized in that: The storage box (18) has a T-shaped groove inside, and the slider (21) and the magnetic block (24) are slidably connected to the T-shaped groove.

10. A mathematical modeling and simulation demonstration device according to claim 9, characterized in that: The storage box (18) and the lower shell (27) are provided with ventilation holes, and the ventilation holes are connected to each other.

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